Knife blade



FIG. 1 is a Left side view of the knife blade showing my new design, the Right side view being a mirror view of the Left side;

FIG. 2 is a Top side view thereof;

FIG. 3 is a Bottom view thereof; and,

FIG. 4 is a Front view thereof.

The broken lines shown in the drawing are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a knife blade, as shown and described. 